So I guess this pump machine is still continuing. Their banking issues are also popping up every now and then. In short, never store your money in USDT for too long.
Starting from March 2020, every time there was a issue of tether, there was rally of btc
first rally was from middle of March, when btc dropped to 3600, and after this begin restore
At binance - starting from middle of March, 2020, difference between total volume of purchased btc and sold btc are negative, but btc are moving up
so problem as for me is - that btc grows up - while the difference between buy and sell volumes is negative
and total volume of this difference corresponds to volume of issued tether (volume of difference is smaller than cost of issued tether)
I didnt checked difference between total volume of purchased btc and sold btc at other exchanges, will be curious make this check for coinbase and other real spot exchanges with real trading, like OKEX and LMAX Digital
when tether is issued - after issuance usdt is moved to wallets at bitfinex, huobi, binance - as i saw